Heat interchanger



' Dec. 30, 1930. A. E. PEW, JR

v HEAT INTERCHANGER Filed June 10, 1926 e m M 7 m W y H w a n w\ E m R m M u R h z Q R .W M A IL w n b N Patented Dec. 30, 1930 UNITED STATES PATENT OFFICE ARTHUR E. PEW, JR, OF BBYN MAWB, PENNSYLVANIA, ASSIGNOB TO SUN OIL COI- PANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF NEW JERSEY HEAT INTERCHANGEB Application filed June 10,

My invention relates to heat interchangers, of the type adapted for eflecting heat interchange between fluids, as gases or liquids.

In the provision of an eflicient heat interi change apparatus numerous problems arise which heretofore have not been solved with maximum satisfaction. F or'example, heat interchange apparatus must have the capacity for maximum heat interchange between two fluids, whether it is intended as a preheater or as a cooler and it must be so constructed as to have a capacity for different degrees of expansion in different arts.

Now it is the object o my invention to provide a heat interchange apparatus of a novel construction, which will have a maximum efficiency for the purpose intended and in which the problem of differential expan sion will be taken care of in a novel and highly 2o eflicient manner.

Further objects of my invention are to provide an apparatus which will be relatively simple and inexpensive to construct and .maintain and which, at the same time, will operate with a maximum of efliciency.

Having now indicated, in a general way, the nature and purpose of my invention, 1 will proceed to a detailed description thereof with reference to the accompanying drawings in which there has been illustrated a preferred embodiment and in which:

Fig. 1, is a side view of a heat interchange! embodying my invention, partly broken away and partly in section.

F Fig. 2, is a cross sectional view on line 2-2,

ig. L.

.Fig. 3, is a view partly in section showing details of construction of the subject of Fi 1.

The heat exch er shown in the drawings comprises a cyliflifricalcasing made in two pairs of semi-cylindrical sections a, the two sections of each pair being secured together by bolts passing through abutting ongitudinal flanges b and the two airs of sections being secured together by Its passing through semi circumferential flan q. The casing is provided with man holes 1' and fitted with eyes a for engaging a hoist. To one to end of the casing is secured a tube sheet f 1926. Serial No. 114,91 o.

to which is secured the ends of a plurality of tubes 9' extending longitudinally within the casing and supported intermediate their ends by supporting sheets 3 The casing is provided adjacent the tube sheet f with an inlet opening 0 and an outlet 19. A head It in which is formed chambers j and k5 is secured to the tube sheet f by means of bolts if each of which, as shown in Figure 3, passes through the head and into the tube sheet and engages in a fitting u, threaded into the tube sheet and which serves to clamp thereto a support n to which is bolted the end of a partition I, which extends longitudinally of the casing and is provided with flanges 10 at its edges for securing to the casing.

The opposite end of the casing is enlarged, as at a:, for the reception of a second tube sheet m, of less area than the enlargement of the casing, which is supported by the tubes at a point beyond the end of partition I. A head n forming a closure for the tubes, is secured to the tube sheet and the end of the casing is closed by a head e.

A circulation of fluid in the tubes may be effected by the introduction of fluid through chamber 7'', thence through the tubes 1n communication with that chamber to chambern,thence back to chamlmrF'throughthe tubes in communication with that chamber and thence out through chamber 10''. Arcirculation of fluid within the casing, preferably in a direction opposite to that through the tubes, may be efl'ected by the introduction of fluid through inlet 0' into the casing, through the casing on one side of partition 1, around the end of the partition Z and by tube sheet m, to return on the other side of the partition and out through, outlet p. Thus it will be observed that if a heated fluid be circulated through the tubes and a cool fluid be circulated through the casing, an efiicient heat interchange will be effected.

In the circulation of a heated fluid through the tubes and of a cool fluid through-the casing, there is a substantial difierence in the degree of expansion of the tubes and casing, and it will be observed that in the structure embodying my invention the tubes and cas' ing are free to expand independently of each other since the tubes are supported from the casing only at one end, being entirely free from the casing at the other, since one of the tube sheets and the tube head supported thereby is free to move within the casing.

Access to the tubes may be readily obtained by the removal of bole t.

The apparatus embodying my invention may be used for effecting heat interchange between either liquids or gases or between a liquid and a gas.

Having now fully described my invention, what I claim and desire to protect by Letters Patent is:

1. A heatexchanger casing composed of a plurality of pairs of sections, each pair being composed of complementary semi-cylindrical sections, abuttlng longitudinally extending flanges along adjacent edges of the casing sections of each pair and abutting circumferential flanges on adjacent ends of adjacent pairs of casing sections, and means securing said abutting flanges.

2. A heat interchanger comprising a cy-. lindrical casing, a head at one end of the casing, a tube sheet confined between the said casing and head, a partition between said head and tube sheet, tubes carried by said tube sheet and extending nearly throughout the length of the casing, a partition extending nearly throughout the length of the casin and having a wing along its longitudin5 edge secured to the casing, a bolt extending through the partition in the head and the tube sheet, and partition supporting means including a supporting member on the last mentioned partition and a fitting internally threaded on the bolt and externally threaded on the tube sheet.

3. A heat interchanger comprising a cylindrical casing, a head at one end of the casing, a tube sheet confined between said casing and head, a partition between said head and tube sheet, tubes carried by said tube sheet and extending nearly throughout the length of the casing, a bolt extending through the partition in the head and the tube sheet, a fitting internally threaded on the bolt and externally threaded on the tube sheet, a support which is clamped by said fitting against the tube sheet, and a partition extending nearly throughout the length of the casing and secured to said support.

In testimony of which invention, I have hereunto set my hand at Philadelphia, Penna, on this 8th day of June, 1926.

ARTHUR E. PEW, JR. 

